I did a search using the create mailing list feature in the CP, now the question is: can it be done so instead of a mailing list, you get a list of people to delete, showing, of course, their sign up date?. I think that would do it as far as the hack goes, and it seems it'd take the same load to do it as it takes to build the mailing list, or wouldn't it?.
I tried coming up with it, but really my perl is not good enough.
Regards
Rabriar